JP2012127715A - Floating type oil leak detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating type oil leak detecting device that can prevent the floating type oil leak detector thereof from rotating.SOLUTION: A floating type detecting device 10 is provided with a disk-shaped floating type detector 1, three guide rods 2 and first rotation preventing means 3; the floating type detector 1, installed in a drain tank 90 for keeping drain water W, can detect any oil contained in the drain water W; the three guide rods 2, extending upward upright from the bottom face of the drain tank 90 and so surrounds the external circumference of the floating type detector 1 as to enable the detector to float; the first rotation preventing means 3, engaging with the three guide rods 2, prevents the floating type detector 1 from rotating on a substantially horizontal plane; the first rotation preventing means 3 includes an annular band member 31 coupled to the external circumference of the floating type detector 1 and three first guide members 32 each having a concave 32a so engaging with the guide rod 2 as to enclose the guide rod 2 from the two sides thereof.

Description

  The present invention relates to a floating oil leak detection device. In particular, the present invention relates to a structure of a floating oil leak detection device that prevents rotation of a floating oil leak detector installed in a drain tank or the like when floating.

  In a thermal power plant or the like, fuel such as oil or coal is stored in order to generate superheated steam in a boiler. And in such a business establishment, the oil bank is provided in the place where the fuel was stored so that the stored oil may not flow outside. In addition, in such business establishments, floating oil leak detectors are installed in drainage tanks that store rainwater temporarily, and inspect whether rainwater contains oil. .

  FIG. 6 is a drainage system diagram showing an example of drainage equipment provided in the thermal power plant as described above. Referring to FIG. 6, in a business establishment 100 such as a thermal power plant, a tank T for storing fuel oil is installed outdoors. Further, in the business place 100, an oil breakwater Wt is installed in front of the tank T to prevent the oil flowing out from the tank T from diffusing outside.

  Referring to FIG. 6, a side groove 91 for storing rainwater is disposed in the vicinity of the oil barrier Wt between the tank T and the oil barrier Wt. The side groove 91 communicates with a drain tank 90 called a pit through a drain pipe D buried underground.

  Referring to FIG. 6, the drain pipe D is connected to the on-off valve V. The on-off valve V is normally closed, but is configured to open by driving the motor M when draining rainwater accumulated in the side groove 91 to the drainage tank 90. The drain tank 90 can temporarily store rainwater flowing from the drain pipe D.

  Referring to FIG. 6, the drainage tank 90 is provided with a floating oil leak detector (hereinafter abbreviated as a floating detector) 1. The floating detector 1 can float on the wastewater stored in the drainage tank 90 and can detect oil contained in the wastewater. For example, after visually confirming that the drainage of the drainage tank 90 does not contain oil, it is drained to the sea, but the drainage of the drainage tank 90 does not contain oil even during drainage. 1 to confirm.

  Next, the configuration of the floating detector 1 will be described. FIG. 7 is a front view showing an example of the conventional floating detector 1 described above. Referring to FIG. 7, the floating detector 1 includes a float main body 11 having an inverted frustoconical shape with a hollow inside, and a lid body 12 that covers the top of the float main body 11 so as to be hermetically sealed, and is formed in a disc shape. ing.

  Referring to FIG. 7, the float main body 11 has three detection electrodes 1 a protruding downward. The oil can be detected when all the three detection electrodes 1a are in contact with the oil. In addition, these detection electrodes 1a are equiangularly arranged every 120 degrees in a plan view.

  Referring to FIG. 7, a detection circuit (not shown) connected to the detection electrode 1 a is arranged inside the float body 11. A connecting cable 12w extends upward at the center of the upper surface of the lid 12. And the change of the electrostatic capacitance detected with the detection electrode 1a is converted into a direct current by the detection circuit, and is sent out from the connection cable 12w as a detection signal. An operation indicator lamp 12m that can confirm the operation of the detection electrode 1a is disposed on the upper surface of the lid 12. When the operation indicator lamp 12m is lit, it can be visually confirmed that the floating detector 1 has detected oil.

  As a device using the above-described floating type oil leak detector, an oil receiving device that has a simple structure and can detect oil with high accuracy at an early stage is disclosed (for example, see Patent Document 1).

  The oil receiving apparatus according to Patent Document 1 is an oil / water separation type oil receiving apparatus that receives a liquid in which oil can be mixed into water due to oil leakage, and includes a receiving tank and an oil / water separation tank. The receiving tank can receive the liquid. The oil / water separation tank is connected to the receiving tank and separates the oil contained in the liquid upward and the water downward.

  The oil receiver according to Patent Document 1 includes a drain pipe, a storage tank, and a floating oil leak detector. The drain pipe is connected to the lower part of the oil / water separation tank, and drains the water remaining in the lower part when the liquid flowing into the oil / water separation tank reaches a predetermined water level. The storage tank can store water drained from the drain pipe. The floating type oil leak detector detects oil when the oil in the oil / water separation tank reaches a predetermined liquid depth. The area of the liquid level in the oil / water separation tank is smaller than the area of the liquid level in the storage tank.

JP 2010-221123 A

  As disclosed in FIG. 3 of the specification of Patent Document 1, the floating detector 1 is surrounded by three guide rods whose outer periphery stands up from the bottom surface in the tank and extends upward. Therefore, the floating detector 1 is allowed to move up and down as the water level in the tank fluctuates, and is restricted from moving in the horizontal direction.

  However, referring to FIGS. 6 and 7, the interval between the three guide rods (not shown) described above is set slightly narrower than the diameter of the floating detector 1. Therefore, when the amount of drainage into the drainage tank 90 per unit time is great, there is a problem that the floating detector 1 may swing and jump out of these guide bars.

  6 and 7, when the inflow amount of the drainage into the drainage tank 90 per unit time is severe, the force for swinging or rotating the floating detector 1 works and the connection cable 12w is excessive. A problem that the life until the connection cable 12w is disconnected is shortened.

  The floating oil leak detector is prevented from flowing out between the guide rods surrounding the disk-shaped floating oil leak detector, and an excessive load is applied to the connection cable connected to the floating oil leak detector. There is a need for a floating oil leak detection device that prevents it from being applied. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such a problem, and prevents the floating-type oil leak detector from flowing out between a plurality of guide rods and prevents an excessive load from being applied to the connection cable. An object of the present invention is to provide a floating oil leakage detection device that can extend the life of a connection cable.

  The present inventor provides a floating oil leak detection device that engages with a plurality of guide rods surrounding a disk-shaped floating oil leak detector to prevent rotation of the floating oil leak detector in a substantially horizontal plane. It has been found that these problems can be solved by providing the vessel, and based on this, the following new floating type oil leak detection device has been invented.

  (1) A floating oil leak detection device according to the present invention is installed in a drainage tank for storing drainage, floats on a drainage surface, and is a disc-shaped floating oil leak detector capable of detecting oil contained in drainage, Three or more guide rods that stand up from the bottom of the drainage tank and extend upward and surround the outer periphery of the floating oil leak detector so that the floating oil leak detector can float, and the floating oil leaks by engaging with these guide rods Rotation prevention means for preventing rotation of the detector in a substantially horizontal plane.

(2) The rotation preventing means includes an annular band member fastened to the outer periphery of the floating oil leak detector so as to be in close contact with the outer periphery of the floating oil leak detector, and a centrifugal direction from the band member. A first guide member that is attached to the band member so as to protrude and has a concave portion that engages with the guide rod so as to surround the guide rod from both sides thereof. .
(3) The rotation prevention means includes an annular band member fastened to the outer periphery of the floating oil leak detector so as to be in close contact with the outer periphery of the floating oil leak detector, and a centrifugal direction from the band member. A second guide member that is attached to the band member so as to protrude toward the opposite side, and is arranged at a predetermined interval so as to surround the guide rod from both sides thereof. May be included.

  (4) The rotation preventing means is attached to the outer periphery of the floating oil leak detector so as to protrude in the centrifugal direction from the outer periphery of the floating oil leak detector, and surrounds the guide rod from both sides thereof. In this manner, the same number of third guide members as the guide rods may be included.

  The floating type oil leak detection device according to the present invention includes a rotation preventing means that engages with the guide rod and prevents the floating type oil leak detector from rotating in a substantially horizontal plane. The oil leak detector can be prevented from popping out, and an excessive load can be prevented from being applied to the connection cable connected to the floating oil leak detector.

It is a perspective view which shows the structure of the floating type oil leak detection apparatus by 1st Embodiment of this invention. It is a front view which shows the structure of the floating type oil leak detection apparatus by 1st Embodiment. It is a top view which shows the structure of the floating type oil leak detection apparatus by 1st Embodiment. It is a top view which shows the structure of the floating type | mold oil leak detection apparatus by 2nd Embodiment of this invention. It is a top view which shows the structure of the floating type | mold oil leak detection apparatus by 3rd Embodiment of this invention. It is a drainage system figure showing an example of drainage equipment provided in a thermal power station. It is a front view which shows an example of the conventional floating type | mold detector.

[First Embodiment]
[Configuration of floating oil leak detector]
First, the configuration of the floating oil leakage detection device according to the first embodiment of the present invention will be described. Note that components having the same reference numerals as those used in the background art have the same action, and may be omitted in the following description.

  FIG. 1 is a perspective view showing a configuration of a floating type oil leak detection device according to a first embodiment of the present invention. FIG. 2 is a front view showing the configuration of the floating oil leakage detection device according to the first embodiment. FIG. 3 is a plan view showing the configuration of the floating oil leakage detection device according to the first embodiment.

  Referring to FIGS. 1 to 3, a floating type oil leak detection device (hereinafter abbreviated as a floating type detection device) 10 according to a first embodiment of the present invention includes a disk-shaped floating type detector 1 and three guide rods. 2 is provided. The floating detector 1 is installed in a drain tank 90 that stores drainage W (see FIG. 6). In addition, the floating detector 1 can float on the drainage surface and detect oil contained in the drainage W. In FIG. 1 to FIG. 3, the detection electrode 1a and the operation indicator lamp 12m are not shown (see FIG. 7).

  1 to 3, the three guide rods 2 stand up from the bottom surface of the drainage tank 90 and extend upward, and surround the outer periphery of the floating detector 1 so that it can float. A plurality of anchor bolts 9 b are embedded in the bottom surface of the drainage tank 90. These anchor bolts 9b fix a pair of support brackets 2a and 2b arranged at a predetermined interval.

  Referring to FIG. 1 or FIG. 2, the pair of support brackets 2a and 2b support the ring member 2c. The ring member 2c supports the lower ends of the three guide rods 2 with male screws (not shown). The upper ends of the three guide bars 2 are supported by a top plate (not shown).

  Further, referring to FIGS. 1 to 3, the floating detection device 10 is engaged with the three guide rods 2 to prevent the rotation detector 1 from rotating in a substantially horizontal plane. It has. The first rotation preventing means 3 includes an annular band member 31 and three first guide members 32.

  Referring to FIGS. 1 to 3, the band member 31 has an inner diameter slightly larger than the outer diameter of the floating detector 1. Then, by fastening a pair of fastening pieces 31 a and 31 a provided at the end portion of the band member 31 with screws and nuts, the inner diameter of the band member 31 is reduced, and is closely attached to the outer periphery of the floating detector 1. Thus, it can be fastened to the outer periphery of the floating detector 1.

  1 to 3, the three first guide members 32 are attached to the band member 31 so as to protrude from the band member 31 in the centrifugal direction. Moreover, the 1st guide member 32 has the recessed part 32a engaged with the guide rod 2 so that the guide rod 2 may be enclosed from the both sides. For example, the three first guide members 32 are detachably fixed to the outer surface of the band member 31 with flat head screws 33.

[Operation of floating oil leak detector]
Next, the operation and effect of the floating detection device 10 according to the first embodiment will be described. Referring to FIGS. 1 to 3, the floating detector 10 includes a first guide member 32 that engages with three guide rods 2 that surround the disk-shaped floating detector 1. These first guide members 32 are fixed to the floating detector 1 via a band member 31.

  Referring to FIGS. 1 to 3, the three first guide members 32 are guided by the guide rod 2. The floating detector 1 is allowed to move up and down as the water level of the drainage tank 90 fluctuates. On the other hand, in the floating detector 1, the first guide member 32 is locked to the guide rod 2, and rotation in a substantially horizontal plane is prevented.

  The floating type detection device 10 according to the first embodiment guides the first guide member 32 so as to surround the guide rod 2 from both sides even when the amount of drainage into the drainage tank 90 per unit time is intense. Since it is engaged with the rod 2, it is restricted by at least one first guide member 32 and the floating detector 1 is prevented from jumping out of the three guide rods 2 in the centrifugal direction. The

  In addition, the floating type detection device 10 according to the first embodiment is configured such that the first guide member 32 provided in the floating type detector 1 guides even when the amount of drainage into the drain tank 90 per unit time is intense. It is regulated by the rod 2 and its rotation is suppressed. Thereby, since the load given to the connection cable 12w is reduced, the lifetime of the connection cable 12w can be extended.

[Second Embodiment]
[Configuration of floating oil leak detector]
Next, the configuration of the floating oil leakage detection device according to the second embodiment of the present invention will be described. FIG. 4 is a plan view showing the configuration of the floating type oil leak detection device according to the second embodiment of the present invention. Note that components having the same reference numerals as those used in the background art and the first embodiment have the same operation, and may be omitted in the following description.

  With reference to FIG. 1 and FIG. 2, and referring to FIG. 4, the floating detector 20 according to the second embodiment of the present invention includes a disk-shaped floating detector 1 and three guide bars 2. The floating detector 1 is installed in a drain tank 90 that stores drainage W (see FIG. 6). In addition, the floating detector 1 can float on the drainage surface and detect oil contained in the drainage W.

  Referring to FIG. 4, the floating detector 20 includes second rotation preventing means 4 that engages with the three guide rods 2 and prevents the floating detector 1 from rotating in a substantially horizontal plane. The second rotation preventing means 4 includes second guide members 42 and 42 that form three pairs with the annular band member 41.

  Referring to FIG. 4, the band member 41 has an inner diameter slightly larger than the outer diameter of the floating detector 1. Then, by fastening a pair of fastening pieces 41a and 41a provided at the ends of the band member 41 with screws and nuts, the inner diameter of the band member 41 is reduced, and is closely attached to the outer periphery of the floating detector 1 Thus, it can be fastened to the outer periphery of the floating detector 1.

  Referring to FIG. 4, the three pairs of second guide members 42 and 42 are attached to the band member 41 so as to protrude from the band member 41 in the centrifugal direction. The paired second guide members 42 and 42 are arranged at a predetermined interval so as to surround the guide rod 2 from both sides. For example, these second guide members 42 are detachably fixed to the outer surface of the band member 31 with flat head screws 43.

[Operation of floating oil leak detector]
Next, operations and effects of the floating detection device 20 according to the second embodiment will be described. Referring to FIG. 1, FIG. 2, and FIG. 4, the floating detector 20 includes second guide members 42 and 42 that form a pair that engages with three guide rods 2 that surround the disk-shaped floating detector 1. ing. The paired second guide members 42 and 42 are fixed to the floating detector 1 via the band member 41.

  Referring to FIG. 1, FIG. 2, and FIG. 4, three pairs of second guide members 42 and 42 are guided by the guide rod 2. The floating detector 1 is allowed to move up and down as the water level of the drainage tank 90 fluctuates. On the other hand, in the floating detector 1, the paired second guide members 42 and 42 are engaged with the guide rod 2 to prevent rotation in a substantially horizontal plane.

  In the floating type detection device 20 according to the second embodiment, even when the amount of drainage into the drainage tank 90 per unit time is intense, the pair of second guide members 42 and 42 make the guide rod 2 on both sides thereof. Since it is engaged with the guide rod 2 so as to be surrounded by the guide rod 2, it is regulated by at least one pair of second guide members 42, 42, and the floating detector 1 is directed in the centrifugal direction to provide three guides. Jumping out of the bar 2 is prevented.

  Further, the floating type detection device 20 according to the second embodiment has a pair of second guide members provided in the floating type detector 1 even when the amount of drainage into the drainage tank 90 per unit time is severe. 42 and 42 are regulated by the guide rod 2 and their rotation is suppressed. Thereby, since the load given to the connection cable 12w is reduced, the lifetime of the connection cable 12w can be extended.

[Third Embodiment]
[Configuration of floating oil leak detector]
Next, the configuration of the floating oil leak detection device according to the third embodiment of the present invention will be described. FIG. 5 is a plan view showing the configuration of the floating type oil leak detection device according to the third embodiment of the present invention. Note that components having the same reference numerals as those used in the background art, the first embodiment, and the second embodiment have the same operation, and may be omitted in the following description.

  Referring to FIG. 5 with reference to FIGS. 1 and 2, a floating type detection device 30 according to the third embodiment of the present invention includes a disk-shaped floating type detector 1 and three guide bars 2. The floating detector 1 is installed in a drain tank 90 that stores drainage W (see FIG. 6). In addition, the floating detector 1 can float on the drainage surface and detect oil contained in the drainage W.

  Referring to FIG. 5, the floating detector 30 includes third rotation preventing means 5 that engages with the three guide rods 2 and prevents the floating detector 1 from rotating in a substantially horizontal plane. The third rotation preventing means 5 includes three third guide members 52.

  Referring to FIG. 5, the three third guide members 52 are attached to the outer periphery of the floating detector 1 so as to protrude in the centrifugal direction from the outer periphery of the floating detector 1. Moreover, the 3rd guide member 52 has the recessed part 52a engaged with the guide rod 2 so that the guide rod 2 may be enclosed from the both sides. For example, the three third guide members 52 are detachably fixed to the outer periphery of the floating detector 1 with a countersunk screw 53.

[Operation of floating oil leak detector]
Next, operations and effects of the floating detection device 30 according to the third embodiment will be described. The floating type detection device 30 according to the third embodiment has the same effect as the floating type detection device 10 according to the first embodiment and the floating type detection device 20 according to the second embodiment. Since the three third guide members 52 are directly attached to the outer periphery of the floating detector 1, there is an advantage that a band member is unnecessary.

The floating oil leak detection device according to the present invention can be expected to have the following effects.
(1) A floating oil leak detector is provided by attaching to the floating oil leak detector a guide member having a recess engaging the guide rod so as to surround the guide rod guiding the floating oil leak detector from both sides thereof. Is prevented from flowing out between these guide bars.
(2) The floating type oil leak detector is prevented from flowing out between these guide rods, and the rotation of the floating type oil leak detector is suppressed, thereby giving an excessive load to the connection cable. Can be prevented.
(3) Since excessive movement of the floating oil leak detector is suppressed, damage to the floating oil leak detector is suppressed, and a normal detection state can be maintained for a long time. And the oil contained in waste water can be detected reliably.

  Although the floating type oil leak detection device according to the present invention has been disclosed as an embodiment suitable for a floating type oil leak detector that can be floated by being guided by three guide rods arranged at equal angles, for example, the guide rod Is not limited to three. The present invention can also be applied to a floating oil leak detector that can be floated by being guided by four guide bars located at the four corners of a rectangle.

1 Floating detector (floating oil leak detector)
2 Guide rod 3 First rotation prevention means (rotation prevention means)
10 Floating detector (Floating oil leak detector)
31 Band member (rotation prevention means)
32 1st guide member (rotation prevention means)
32a Concave portion (concave portion of first guide member)
90 Drainage tank W Drainage

Claims (4)

A disk-shaped floating oil leak detector that is installed in a drainage tank that stores drainage, floats on the drainage surface, and can detect oil contained in drainage,
Three or more guide rods that stand up from the bottom surface of the drainage tank and extend upward and surround the outer periphery of the floating oil leak detector so that the floating oil leak detector can float.
An anti-floating oil leak detection device comprising: an anti-rotation means that engages with these guide rods to prevent the floating oil leak detector from rotating in a substantially horizontal plane. The rotation preventing means is
An annular band member fastened to the outer periphery of the floating oil leak detector so as to be in close contact with the outer periphery of the floating oil leak detector;
The same number of first guides as the guide rods, which are attached to the band members so as to protrude in the centrifugal direction from the band members, and have recesses that engage the guide rods so as to surround the guide rods from both sides thereof. The floating oil leakage detection device according to claim 1, comprising a member. The rotation preventing means is
An annular band member fastened to the outer periphery of the floating oil leak detector so as to be in close contact with the outer periphery of the floating oil leak detector;
It is attached to the band member so as to protrude from the band member in the centrifugal direction, and is arranged at a predetermined interval so as to surround the guide rod from both sides thereof. The floating oil leak detection device according to claim 1, further comprising a second guide member. The rotation preventing means is
It is attached to the outer periphery of the floating oil leak detector so as to protrude in the centrifugal direction from the outer periphery of the floating oil leak detector, and engages with the guide rod so as to surround the guide rod from both sides thereof. The floating type oil leak detection device according to claim 1, comprising the same number of third guide members as the guide rods having a recess.

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